a:=7 b:=4 b:=2*a+3*b b:=a/2*b

Let's go through the operations step by step, using the values initially assigned to \( a \) and \( b \):

1. Initial values:

   • \( a = 7 \)
   • \( b = 4 \)

2. First operation: \[ b := 2*a + 3*b \] Substitute the values of \( a \) and \( b \): \[ b := 2*7 + 3*4 \] Calculate the right side: \[ b := 14 + 12 = 26 \]

3. Second operation: \[ b := a/2*b \] Substitute the values of \( a \) (which is still 7) and the new value of \( b \) (which is now 26): \[ b := 7/2 * 26 \] This evaluates to: \[ b = 3.5 * 26 = 91 \]

So, after performing all the operations, the final value of \( b \) is \( b = 91 \).

Final values:

• \( a = 7 \)
• \( b = 91 \)